Phenol-aldehyde condensation product.



STATES PATENT o FIGE.

mnonon SETH WENNAGEL, E ALT-RAHLSTEDT, NEAR neurone, GERMANY,

nssIGNon 'ro THE Emu or NAAMLOOZE VENNOOTSGHAP HOLLANDSCHErno'mmn'uu'rscnurn, 0E AMSTERDAM, NETHERLANDS.

PHENOL-ALDEHYEDE CONDENSATION PRODUCT.

Io Drawing.

To all whom it may concern:

Be it known that I, THEOooR SETH WVEN- NAGEL, a subject of the GermanEmperor, and resident of Alt-Rahl'stedt, near Harnburg, German Empire,have invented certain new and useful Improvements in Phenol-AldehydeCondensation Products, where- 4 of the followingis a specification.

be submitted, after the difficult cleaning process,

remain in the final The up to date known processes of manufacturing theproducts, of the condensation of henols and aldehydes present thedrawbac that, under the action of light and air, intermediate pigmentsare formed in the ready product, which pigments alter the superficialcolor of the same, unless troublesome cleaning processes or carefullypurified raw materials have been made use of in the manufacture of thepastes.

According to the old process it was necessary to employ pure crystallinephenol. for obtaining transparent products of condensation. But even theproposals tending to apply mineral acids as a condensing means did notproduce any unobjectionable result. The products obtained in this mannerhad to condensation, to a for the purpose of preventing .that freemineral acids would roduct. In contradistinctionto the hereinbeforedescribed processes the new method, according to m invention, affordsthe possibility of obtaining, from omparatively crude raw materials andwithout complicated cleaning processes or the like, a superior productof a ve great resistance to the action of light and air and,-besi des1s,adapted to harden in a better manner by far than the hitherto knownproducts, so that now, with the application of pressure, even biggfrlumps may in a short time be sufiiciently' ardened. Ac-

cording-to my, invention this result is attained in that the neutralalkali salts of the aromatic oxyacids in small quantities are made useof as condensing means, especially the neutral alkali salts which arenot hydrolytically disassociated. Y

The quantities to be taken are preferably selected so as to be about the1/25 part of the 7 weight of the phenol to be made use of.

' Specificationpf Letters Patent.

I color.

" tion takes place. I

erably yiolent nature, the heating of the I hyde condensation products,

Special. care must be taken that the salts employedin this process arein a very high degree neutral, as even small excesses of-fnee alkali,hence also the basic salts of the aforesaid acids, influence the finalproduct in such a degree that it shows changes in its A further progressdue to my invention consists therein that one can obtain .cleartransparent final products, even with the use of crude carbolic acids(cresols).

As aromatic acids, the salts of which may housed, the following maybeconsidered:.

oxybenzoic acids, tannic acids and the like.

As" an example. the new process may be carried out as follows:

In a boiler 100' parts of phenol, 80 parts of formic aldehyde of 40% andfrom 5-10 parts ofan aqueous-solution (50%) of quite neutral salicylateofpotassium 'or sodium are carefully mixed As the latter is of atolboiler is reduced during said reaction.

After its conclusion, the water, contained in the raw materialsemployed, will be expelled, whereupon cast into molds.

tion is quite liquid and may be hardened, for instance, in open molds ata temperature of from'6080 C. a result to be obtained in about 12 hours.

What I claim as to secure ,by-Letters Patent is 1. The process ofobtaining 1 henol aldehyde condensation products, w in using the. neutraalkali salts of the arcmatic oxyacids as condensing means.

2-.- The process of obtaining phenol aldewhich consists in using theneutral alkali salts of the aromatic oxyacids which arenothydrolytically disassociated as condensing means. 5 a In testimonywhereof I have si ma this ing witnesses. THEODORSETH WENNAGEL.

.Witnesses:

. HENRY HASPER, An'rn'oa JENNINGS.

and heated till the reacich consists- Patented July 30, 1918.

Application filed January 22, 1917. Serial No. 143,853.

the paste or mass may be The product of the reacmy invention and desire

